struct yx_uint16 t = mv_yx_in_dir (d, world->player->pos);
struct Monster * monster;
for (monster = world->monster; monster != 0; monster = monster->next)
struct yx_uint16 t = mv_yx_in_dir (d, world->player->pos);
struct Monster * monster;
for (monster = world->monster; monster != 0; monster = monster->next)